X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Fllvm%2FCodeGen%2FMachineFunction.h;h=f4c2542b990de42d4a17e46f47ace590b7cde95b;hb=e703fcb9757820fe27d9ef98ce3775d9c6d6e898;hp=f31c99a6f982afd55f6df87e3a5a6d9ad507bdb8;hpb=7a5a3f75eb6751c35682f506887c34bf57d6ea3e;p=oota-llvm.git diff --git a/include/llvm/CodeGen/MachineFunction.h b/include/llvm/CodeGen/MachineFunction.h index f31c99a6f98..f4c2542b990 100644 --- a/include/llvm/CodeGen/MachineFunction.h +++ b/include/llvm/CodeGen/MachineFunction.h @@ -18,10 +18,11 @@ #ifndef LLVM_CODEGEN_MACHINEFUNCTION_H #define LLVM_CODEGEN_MACHINEFUNCTION_H -#include "llvm/CodeGen/MachineBasicBlock.h" #include "llvm/ADT/ilist.h" -#include "llvm/Support/DebugLoc.h" +#include "llvm/CodeGen/MachineBasicBlock.h" +#include "llvm/IR/DebugLoc.h" #include "llvm/Support/Allocator.h" +#include "llvm/Support/ArrayRecycler.h" #include "llvm/Support/Recycler.h" namespace llvm { @@ -105,6 +106,9 @@ class MachineFunction { // Allocation management for instructions in function. Recycler InstructionRecycler; + // Allocation management for operand arrays on instructions. + ArrayRecycler OperandRecycler; + // Allocation management for basic blocks in function. Recycler BasicBlockRecycler; @@ -120,13 +124,18 @@ class MachineFunction { /// Alignment - The alignment of the function. unsigned Alignment; - /// CallsSetJmp - True if the function calls setjmp or sigsetjmp. This is used - /// to limit optimizations which cannot reason about the control flow of - /// setjmp. - bool CallsSetJmp; + /// ExposesReturnsTwice - True if the function calls setjmp or related + /// functions with attribute "returns twice", but doesn't have + /// the attribute itself. + /// This is used to limit optimizations which cannot reason + /// about the control flow of such functions. + bool ExposesReturnsTwice; - MachineFunction(const MachineFunction &); // DO NOT IMPLEMENT - void operator=(const MachineFunction&); // DO NOT IMPLEMENT + /// True if the function includes any inline assembly. + bool HasInlineAsm; + + MachineFunction(const MachineFunction &) LLVM_DELETED_FUNCTION; + void operator=(const MachineFunction&) LLVM_DELETED_FUNCTION; public: MachineFunction(const Function *Fn, const TargetMachine &TM, unsigned FunctionNum, MachineModuleInfo &MMI, @@ -136,15 +145,19 @@ public: MachineModuleInfo &getMMI() const { return MMI; } GCModuleInfo *getGMI() const { return GMI; } MCContext &getContext() const { return Ctx; } - + /// getFunction - Return the LLVM function that this machine code represents /// const Function *getFunction() const { return Fn; } + /// getName - Return the name of the corresponding LLVM function. + /// + StringRef getName() const; + /// getFunctionNumber - Return a unique ID for the current function. /// unsigned getFunctionNumber() const { return FunctionNumber; } - + /// getTarget - Return the target machine this machine code is compiled with /// const TargetMachine &getTarget() const { return Target; } @@ -187,20 +200,32 @@ public: /// void setAlignment(unsigned A) { Alignment = A; } - /// EnsureAlignment - Make sure the function is at least 'A' bits aligned. - void EnsureAlignment(unsigned A) { + /// ensureAlignment - Make sure the function is at least 1 << A bytes aligned. + void ensureAlignment(unsigned A) { if (Alignment < A) Alignment = A; } - /// callsSetJmp - Returns true if the function calls setjmp or sigsetjmp. - bool callsSetJmp() const { - return CallsSetJmp; + /// exposesReturnsTwice - Returns true if the function calls setjmp or + /// any other similar functions with attribute "returns twice" without + /// having the attribute itself. + bool exposesReturnsTwice() const { + return ExposesReturnsTwice; + } + + /// setCallsSetJmp - Set a flag that indicates if there's a call to + /// a "returns twice" function. + void setExposesReturnsTwice(bool B) { + ExposesReturnsTwice = B; } - /// setCallsSetJmp - Set a flag that indicates if there's a call to setjmp or - /// sigsetjmp. - void setCallsSetJmp(bool B) { - CallsSetJmp = B; + /// Returns true if the function contains any inline assembly. + bool hasInlineAsm() const { + return HasInlineAsm; + } + + /// Set a flag that indicates that the function contains inline assembly. + void setHasInlineAsm(bool B) { + HasInlineAsm = B; } /// getInfo - Keep track of various per-function pieces of information for @@ -234,6 +259,9 @@ public: return MBBNumbering[N]; } + /// Should we be emitting segmented stack stuff for the function + bool shouldSplitStack(); + /// getNumBlockIDs - Return the number of MBB ID's allocated. /// unsigned getNumBlockIDs() const { return (unsigned)MBBNumbering.size(); } @@ -243,12 +271,12 @@ public: /// dense, and match the ordering of the blocks within the function. If a /// specific MachineBasicBlock is specified, only that block and those after /// it are renumbered. - void RenumberBlocks(MachineBasicBlock *MBBFrom = 0); + void RenumberBlocks(MachineBasicBlock *MBBFrom = nullptr); /// print - Print out the MachineFunction in a format suitable for debugging /// to the specified stream. /// - void print(raw_ostream &OS, SlotIndexes* = 0) const; + void print(raw_ostream &OS, SlotIndexes* = nullptr) const; /// viewCFG - This function is meant for use from the debugger. You can just /// say 'call F->viewCFG()' and a ghostview window should pop up from the @@ -271,7 +299,7 @@ public: /// verify - Run the current MachineFunction through the machine code /// verifier, useful for debugger use. - void verify(Pass *p=NULL) const; + void verify(Pass *p = nullptr, const char *Banner = nullptr) const; // Provide accessors for the MachineBasicBlock list... typedef BasicBlockListType::iterator iterator; @@ -326,8 +354,8 @@ public: // Internal functions used to automatically number MachineBasicBlocks // - /// getNextMBBNumber - Returns the next unique number to be assigned - /// to a MachineBasicBlock in this MachineFunction. + /// \brief Adds the MBB to the internal numbering. Returns the unique number + /// assigned to the MBB. /// unsigned addToMBBNumbering(MachineBasicBlock *MBB) { MBBNumbering.push_back(MBB); @@ -339,13 +367,13 @@ public: /// implementation. void removeFromMBBNumbering(unsigned N) { assert(N < MBBNumbering.size() && "Illegal basic block #"); - MBBNumbering[N] = 0; + MBBNumbering[N] = nullptr; } /// CreateMachineInstr - Allocate a new MachineInstr. Use this instead /// of `new MachineInstr'. /// - MachineInstr *CreateMachineInstr(const TargetInstrDesc &TID, + MachineInstr *CreateMachineInstr(const MCInstrDesc &MCID, DebugLoc DL, bool NoImp = false); @@ -364,7 +392,7 @@ public: /// CreateMachineBasicBlock - Allocate a new MachineBasicBlock. Use this /// instead of `new MachineBasicBlock'. /// - MachineBasicBlock *CreateMachineBasicBlock(const BasicBlock *bb = 0); + MachineBasicBlock *CreateMachineBasicBlock(const BasicBlock *bb = nullptr); /// DeleteMachineBasicBlock - Delete the given MachineBasicBlock. /// @@ -376,7 +404,8 @@ public: MachineMemOperand *getMachineMemOperand(MachinePointerInfo PtrInfo, unsigned f, uint64_t s, unsigned base_alignment, - const MDNode *TBAAInfo = 0); + const MDNode *TBAAInfo = nullptr, + const MDNode *Ranges = nullptr); /// getMachineMemOperand - Allocate a new MachineMemOperand by copying /// an existing one, adjusting by an offset and using the given size. @@ -385,6 +414,30 @@ public: MachineMemOperand *getMachineMemOperand(const MachineMemOperand *MMO, int64_t Offset, uint64_t Size); + typedef ArrayRecycler::Capacity OperandCapacity; + + /// Allocate an array of MachineOperands. This is only intended for use by + /// internal MachineInstr functions. + MachineOperand *allocateOperandArray(OperandCapacity Cap) { + return OperandRecycler.allocate(Cap, Allocator); + } + + /// Dellocate an array of MachineOperands and recycle the memory. This is + /// only intended for use by internal MachineInstr functions. + /// Cap must be the same capacity that was used to allocate the array. + void deallocateOperandArray(OperandCapacity Cap, MachineOperand *Array) { + OperandRecycler.deallocate(Cap, Array); + } + + /// \brief Allocate and initialize a register mask with @p NumRegister bits. + uint32_t *allocateRegisterMask(unsigned NumRegister) { + unsigned Size = (NumRegister + 31) / 32; + uint32_t *Mask = Allocator.Allocate(Size); + for (unsigned i = 0; i != Size; ++i) + Mask[i] = 0; + return Mask; + } + /// allocateMemRefsArray - Allocate an array to hold MachineMemOperand /// pointers. This array is owned by the MachineFunction. MachineInstr::mmo_iterator allocateMemRefsArray(unsigned long Num); @@ -412,6 +465,10 @@ public: /// normal 'L' label is returned. MCSymbol *getJTISymbol(unsigned JTI, MCContext &Ctx, bool isLinkerPrivate = false) const; + + /// getPICBaseSymbol - Return a function-local symbol to represent the PIC + /// base. + MCSymbol *getPICBaseSymbol() const; }; //===--------------------------------------------------------------------===// @@ -433,6 +490,7 @@ template <> struct GraphTraits : typedef MachineFunction::iterator nodes_iterator; static nodes_iterator nodes_begin(MachineFunction *F) { return F->begin(); } static nodes_iterator nodes_end (MachineFunction *F) { return F->end(); } + static unsigned size (MachineFunction *F) { return F->size(); } }; template <> struct GraphTraits : public GraphTraits { @@ -448,6 +506,9 @@ template <> struct GraphTraits : static nodes_iterator nodes_end (const MachineFunction *F) { return F->end(); } + static unsigned size (const MachineFunction *F) { + return F->size(); + } };